/usr/share/postgresql/9.5/extension/pgpool_regclass.control is in postgresql-9.5-pgpool2 3.4.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | # pgpool-regclass extension
comment = 'replacement for regclass'
default_version = '1.0'
module_pathname = '$libdir/pgpool-regclass'
relocatable = true
|